Commit 0e559035 authored by Olga Kornievskaia's avatar Olga Kornievskaia Committed by Trond Myklebust
Browse files

sunrpc: provide multipath info in the sysfs directory 



Allow to query xrpt_switch attributes. Currently showing the following
fields of the rpc_xprt_switch structure: xps_nxprts, xps_nactive,
xps_queuelen.

Signed-off-by: default avatarOlga Kornievskaia <kolga@netapp.com>
Signed-off-by: default avatarTrond Myklebust <trond.myklebust@hammerspace.com>
parent 4a09651a

net/sunrpc/sysfs.c

+35 −0
Original line number Diff line number Diff line
@@ -67,6 +67,15 @@ rpc_sysfs_xprt_kobj_get_xprt(struct kobject *kobj) 
	return xprt_get(x->xprt);

}



static inline struct rpc_xprt_switch *

rpc_sysfs_xprt_switch_kobj_get_xprt(struct kobject *kobj)

{

	struct rpc_sysfs_xprt_switch *x = container_of(kobj,

		struct rpc_sysfs_xprt_switch, kobject);



	return xprt_switch_get(x->xprt_switch);

}



static ssize_t rpc_sysfs_xprt_dstaddr_show(struct kobject *kobj,

					   struct kobj_attribute *attr,

					   char *buf)
@@ -102,6 +111,23 @@ static ssize_t rpc_sysfs_xprt_info_show(struct kobject *kobj, 
	return ret + 1;

}



static ssize_t rpc_sysfs_xprt_switch_info_show(struct kobject *kobj,

					       struct kobj_attribute *attr,

					       char *buf)

{

	struct rpc_xprt_switch *xprt_switch =

		rpc_sysfs_xprt_switch_kobj_get_xprt(kobj);

	ssize_t ret;



	if (!xprt_switch)

		return 0;

	ret = sprintf(buf, "num_xprts=%u\nnum_active=%u\nqueue_len=%ld\n",

		      xprt_switch->xps_nxprts, xprt_switch->xps_nactive,

		      atomic_long_read(&xprt_switch->xps_queuelen));

	xprt_switch_put(xprt_switch);

	return ret + 1;

}



static ssize_t rpc_sysfs_xprt_dstaddr_store(struct kobject *kobj,

					    struct kobj_attribute *attr,

					    const char *buf, size_t count)
@@ -235,6 +261,14 @@ static struct attribute *rpc_sysfs_xprt_attrs[] = { 
	NULL,

};



static struct kobj_attribute rpc_sysfs_xprt_switch_info =

	__ATTR(xprt_switch_info, 0444, rpc_sysfs_xprt_switch_info_show, NULL);



static struct attribute *rpc_sysfs_xprt_switch_attrs[] = {

	&rpc_sysfs_xprt_switch_info.attr,

	NULL,

};



static struct kobj_type rpc_sysfs_client_type = {

	.release = rpc_sysfs_client_release,

	.sysfs_ops = &kobj_sysfs_ops,
@@ -243,6 +277,7 @@ static struct kobj_type rpc_sysfs_client_type = { 


static struct kobj_type rpc_sysfs_xprt_switch_type = {

	.release = rpc_sysfs_xprt_switch_release,

	.default_attrs = rpc_sysfs_xprt_switch_attrs,

	.sysfs_ops = &kobj_sysfs_ops,

	.namespace = rpc_sysfs_xprt_switch_namespace,

};